Confusion on SNAT and source IP/Ports

so that all makes sense. But I am guess where I am stuck is a more simple question I think. If I setup El_jefe's recommendation and setup the gateway of the server to the LTM, what happens during backups, or some other operation that I don't want to go through the LTM? I just remember last time I had to do dual NICs, but that seems to be very clumsy to do. Unfortuantly Mark, the needs of this task for Lync requires the source IP address, it's not just for logging, but for QoS and QoE loggoing for Lync and a few other things. So I guess I have to decide if I want to do the dual NIC and put the second NIC on a separate network or use SNAT and follow this article https://support.f5.com/kb/en-us/solutions/public/4000/800/sol4816.html?sr=29839025. No doubt that using SNAT would be easiest to do but but using two NICS gives me more flexability. But if I understand everything correctly, I just use SNAT and check a checkbox and that should do it.